linux-stable.git/drivers/pci/controller/mobiveil, branch v5.8

PCI: Check for platform_get_irq() failure consistently

2020-05-12T13:14:43+00:00

The platform_get_irq*() interfaces return either a negative error number or
a valid IRQ.  0 is not a valid return value, so check for "< 0" to detect
failure as recommended by the function documentation.

On failure, return the error number from platform_get_irq*() instead of
making up a new one.

Link: https://lore.kernel.org/r/cover.1583952275.git.amanharitsh123@gmail.com
[bhelgaas: commit log, squash into one patch]
Signed-off-by: Aman Sharma 
Signed-off-by: Bjorn Helgaas 
Acked-by: Linus Walleij 
Cc: Richard Zhu 
Cc: Lucas Stach 
Cc: Thierry Reding 
Cc: Karthikeyan Mitran 
Cc: Hou Zhiqiang 
Cc: Thomas Petazzoni 
Cc: Ryder Lee 
Cc: Marc Gonzalez

PCI: mobiveil: Fix unmet dependency warning for PCIE_MOBIVEIL_PLAT

2020-03-18T10:39:52+00:00

Fix the following warning by adding the dependency PCI_MSI_IRQ_DOMAIN
to PCIE_MOBIVEIL_PLAT.

WARNING: unmet direct dependencies detected for PCIE_MOBIVEIL_HOST
  Depends on [n]: PCI [=y] && PCI_MSI_IRQ_DOMAIN [=n]
  Selected by [y]:
  - PCIE_MOBIVEIL_PLAT [=y] && PCI [=y] && (ARCH_ZYNQMP || COMPILE_TEST [=y]) && OF [=y]

Signed-off-by: Hou Zhiqiang 
Signed-off-by: Lorenzo Pieralisi

PCI: mobiveil: Fix sparse different address space warnings

2020-03-17T15:38:20+00:00

Fix the sparse warnings below:

drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49: warning: incorrect type in return expression (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49:    expected void *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49:    got void [noderef]  *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41: warning: incorrect type in return expression (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41:    expected void *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41:    got void [noderef]  *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34: warning: incorrect type in argument 1 (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34:    expected void [noderef]  *addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34:    got void *[assigned] addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:121:35: warning: incorrect type in argument 1 (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:121:35:    expected void [noderef]  *addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:121:35:    got void *[assigned] addr

Signed-off-by: Hou Zhiqiang 
Signed-off-by: Lorenzo Pieralisi 
Reported-by: kbuild test robot

PCI: mobiveil: Add PCIe Gen4 RC driver for Layerscape SoCs

2020-02-21T11:54:12+00:00

Add a PCI host controller driver for Layerscape SoCs integrating
the Mobiveil GPEX IP.

Signed-off-by: Hou Zhiqiang 
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Minghuan Lian 
Reviewed-by: Andrew Murray

PCI: mobiveil: Add Header Type field check

2020-02-21T11:53:22+00:00

Check the Header Type and exit from the host driver initialization if
it is not in host mode.

Signed-off-by: Hou Zhiqiang 
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Andrew Murray

PCI: mobiveil: Add 8-bit and 16-bit CSR register accessors

2020-02-21T11:53:22+00:00

There are some 8-bit and 16-bit registers in PCIe configuration
space, so add these accessors accordingly.

Signed-off-by: Hou Zhiqiang 
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Minghuan Lian 
Reviewed-by: Subrahmanya Lingappa 
Reviewed-by: Andrew Murray

PCI: mobiveil: Allow mobiveil_host_init() to be used to re-init host

2020-02-21T11:53:22+00:00

Allow the mobiveil_host_init() function to be used to re-init
host controller's PAB and GPEX CSR register block, since the NXP
integrated Mobiveil IP has to reset and then re-init the PAB
and GPEX CSR registers upon hot-reset.

Signed-off-by: Hou Zhiqiang 
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Subrahmanya Lingappa 
Reviewed-by: Andrew Murray

PCI: mobiveil: Add callback function for link up check

2020-02-21T11:53:22+00:00

Platforms integrating the Mobiveil GPEX can implement a specific
mechanism to check the link status.

Add a callback to enable platform specific link status functions.

Signed-off-by: Hou Zhiqiang 
[lorenzo.pieralisi@arm.com: updated log]
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Andrew Murray

PCI: mobiveil: Add callback function for interrupt initialization

2020-02-21T11:53:22+00:00

The Mobiveil GPEX internal MSI/INTx controller is not implemented
in all platforms in which the Mobiveil GPEX is integrated.

Allow platforms to implement their specific interrupt initialization.

Signed-off-by: Hou Zhiqiang 
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Andrew Murray

PCI: mobiveil: Modularize the Mobiveil PCIe Host Bridge IP driver

2020-02-21T11:53:22+00:00

Modularize the Mobiveil PCIe host driver according to the abstraction of
Root Complex and Endpoint and move it into a new directory in order to
make it easier to reuse the driver functions to add new host drivers for
systems integrating the Mobiveil PCIe GPEX IP.

Signed-off-by: Hou Zhiqiang 
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Andrew Murray